{"title":"Anderson-Grüneisen parameter δ and the temperature dependence of the bulk modulus of some fluorides","authors":"R. Ramji Rao","doi":"10.1016/0031-8914(74)90280-8","DOIUrl":null,"url":null,"abstract":"<div><p>The Anderson-Grüneisen parameter δ has been evaluated for NaF, BaF<sub>2</sub> and CaF<sub>2</sub> from the measured third-order elastic constants of these crystals. Using these δ values, the temperature dependence of the bulk modulus of these three fluorides is calculated from Anderson's theory in the temperature range up to their melting points. The bulk moduli of the alkaline earth fluorides CaF<sub>2</sub> and BaF<sub>2</sub> have similar variation with temperature. The temperature variation of the bulk modulus of the alkali halide NaF deviates from those of CaF<sub>2</sub> and BaF<sub>2</sub> and this may be attributed to the difference in the crystal structures.</p></div>","PeriodicalId":55605,"journal":{"name":"Physica","volume":"77 1","pages":"Pages 126-130"},"PeriodicalIF":0.0000,"publicationDate":"1974-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8914(74)90280-8","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0031891474902808","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The Anderson-Grüneisen parameter δ has been evaluated for NaF, BaF2 and CaF2 from the measured third-order elastic constants of these crystals. Using these δ values, the temperature dependence of the bulk modulus of these three fluorides is calculated from Anderson's theory in the temperature range up to their melting points. The bulk moduli of the alkaline earth fluorides CaF2 and BaF2 have similar variation with temperature. The temperature variation of the bulk modulus of the alkali halide NaF deviates from those of CaF2 and BaF2 and this may be attributed to the difference in the crystal structures.
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